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Montana Field Guide

Montana Field Guides

Nodding Onion - Allium cernuum


Global Rank: G5
State Rank: S5
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






State Rank Reason (see State Rank above)
This is our most common and widespread Allium species.
 
General Description
Bulbs elongate-ovoid, solitary or clustered; outer coat membranous with elongate cells, pink beneath. Scapes terete, 10–40 cm, sometimes >1 per bulb. Leaves 3 to 7, flat, 2–6 mm wide, persistent. Umbel nodding, hemispheric with 5–40 flowers; pedicels 8–15 mm long; bracts 2, lanceolate, acute. Flowers white to pink; tepals 4–6 mm long; ovary with prominent triangular crests; stamens exserted. Seed surface smooth to minutely roughened (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
BC to ON south to AZ, NM, TN and WV (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 142

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Meadows, grasslands, woodlands, open forest; plains, valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Nodding Onion — Allium cernuum.  Montana Field Guide.  .  Retrieved on , from